JP2622809B2 - Toothed belt - Google Patents
Toothed beltInfo
- Publication number
- JP2622809B2 JP2622809B2 JP5340651A JP34065193A JP2622809B2 JP 2622809 B2 JP2622809 B2 JP 2622809B2 JP 5340651 A JP5340651 A JP 5340651A JP 34065193 A JP34065193 A JP 34065193A JP 2622809 B2 JP2622809 B2 JP 2622809B2
- Authority
- JP
- Japan
- Prior art keywords
- belt
- power transmission
- tooth
- tip
- nonwoven fabric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は歯付ベルトに係り、液状
ポリウレタン等のエラストマー材料から形成された歯付
ベルトに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toothed belt, and more particularly to a toothed belt formed of an elastomeric material such as liquid polyurethane.
【０００２】[0002]
【従来の技術】従来の歯付ベルトは、加硫ゴムから成形
されたものや液状ポリウレタン等を原料として形成され
たものが知られている。このうち、ポリウレタン製歯付
ベルトは、耐候性と耐摩耗性に優れているために、屋外
で使用される自転車等の動力伝達装置に装着されてい
る。このポリウレタン製歯付ベルトは、ベルト長手方向
に一定ピッチで歯部と溝部を交互に有し、ピッチライン
上にガラス繊維やアラミド繊維等のロープからなる心線
を背部に埋設した構成からなっている。2. Description of the Related Art Known toothed belts include those formed from vulcanized rubber and those formed from liquid polyurethane or the like. Among them, the toothed belt made of polyurethane is mounted on a power transmission device such as a bicycle used outdoors because of its excellent weather resistance and wear resistance. This polyurethane toothed belt has a configuration in which teeth and grooves are alternately arranged at a constant pitch in the longitudinal direction of the belt, and a core wire made of a rope such as glass fiber or aramid fiber is embedded in a back portion on a pitch line. I have.
【０００３】しかし、この歯付ベルトは溝部の歯底面に
補強材が存在しないために、歯底面が摩耗して心線の損
傷が起こりやすくなっていた。具体的には、駆動中にほ
こり、砂等の異物がプーリ歯部表面とベルト歯底面の間
に噛み込み、ベルト歯底面が擦られて摩耗しやすくな
り、心線を露出させていた。その結果、心線は水分を吸
収して強度低下を起こし、ベルトを早期に切断させてい
た。[0003] However, in this toothed belt, the reinforcing material does not exist on the bottom surface of the groove portion, so that the bottom surface of the belt is worn and the core wire is easily damaged. Specifically, foreign substances such as dust and sand get stuck between the surface of the pulley teeth and the bottom surface of the belt during driving, and the bottom surface of the belt is rubbed and easily worn, exposing the core wire. As a result, the core wire absorbs moisture and causes a decrease in strength, causing the belt to be cut early.
【０００４】この点を改善するために、荒目の織布をベ
ルト歯底面に沿って配置したポリウレタン製歯付ベルト
が実公昭４６−６４１２号公報に提案され、またエラス
トマー材料を含浸した不織布をベルト歯底面に沿って配
置したポリウレタン製歯付ベルトが実開昭６３−６６６
４８公報に記載されている。In order to improve this point, a polyurethane toothed belt in which a coarse woven fabric is arranged along the bottom surface of the belt is proposed in Japanese Utility Model Publication No. 46-6412, and a nonwoven fabric impregnated with an elastomer material is used. Polyurethane toothed belt placed along the bottom of the belt teeth
48 publication.
【０００５】更に、高負荷伝動の能力をもつベルトとし
て、心線にグレーグフィラメントの引張弾性率が約１．
３×１０6 ｋｇ／ｃｍ2 のアラミド２型コード材料を使
用し、ベルト歯部と歯底面に帆布を被覆したポリウレタ
ン製歯付ベルトが、特公平３−９３３５号公報に開示さ
れている。更に、他のポリウレタン製歯付ベルトとし
て、ベルト歯底面にエラストマー材料を含浸し薄く圧縮
された圧縮不織布を設け、歯部内ではこの圧縮不織布と
連続する不織布が非加圧の拡散状態として分散され、歯
部を補強した構成のものが、特公平５−６２６５７号公
報に開示されている。[0005] Further, as a belt having a high load transmission capability, the tensile elasticity of the Greig filament is about 1.
Using 3 × 10 6 kg / cm 2 aramid type 2 cord material, polyurethane toothed belt coated canvas belt tooth portion and the tooth bottom surface is disclosed in Japanese Patent Kokoku 3-9335. Further, as another polyurethane toothed belt, a compressed non-woven fabric impregnated with an elastomer material is provided on the bottom surface of the belt tooth, and the compressed non-woven fabric continuous with the compressed non-woven fabric is dispersed in the tooth portion in a non-pressurized diffusion state. A structure in which the teeth are reinforced is disclosed in Japanese Patent Publication No. 5-62657.
【０００６】[0006]
【発明が解決しようとする課題】しかし、従来のベルト
歯部と歯底面に帆布を被覆したポリウレタン製歯付ベル
トは、帆布がベルト歯部と歯底面を充分に保護している
ために、心線の損傷が小さくて高負荷伝動を可能にして
いる。しかし、このベルトを製造方法する場合、帆布を
予め金型の溝部に沿わせておかないと、帆布が歯部表面
に密着することができなかった。また、特公平５−６２
６５７号公報に開示された伝動ベルトは、歯部全体を補
強している。However, the conventional toothed belt made of polyurethane in which the belt tooth portion and the tooth bottom surface are covered with canvas has a problem that the canvas sufficiently protects the belt tooth portion and the tooth bottom surface. Wire damage is small and high load transmission is possible. However, when manufacturing this belt, the canvas could not be in close contact with the tooth surface unless the canvas was previously aligned with the groove of the mold. In addition, Japanese Patent Publication 5-62
The transmission belt disclosed in Japanese Patent No. 657 reinforces the entire tooth portion.
【０００７】しかし、従来の歯付べルトを検討した結
果、歯付べルトでは歯部全体をまんべんなく補強する必
要はなく、歯付べルトがプーリと噛み合う時にべルト歯
部の中でも最も圧縮応力を受けるベルト歯元部とそれを
含む領域を補強すればよいことが明らかになった。本発
明はこのような問題点を改善するものであり、特にべル
ト歯部の中で最も圧縮応力を受けるベルト歯元部とそれ
を含む領域を補強して高負荷伝動を可能にし、しかも製
造の容易な歯付ベルトを提供することを目的とする。However, as a result of examining the conventional toothed belt, it is not necessary to reinforce the entire tooth portion of the toothed belt evenly, and when the toothed belt engages with the pulley, the compression stress is the most in the belt tooth portion. It became clear that it was only necessary to reinforce the belt root portion and the region including the belt root portion. The present invention has been made to solve such a problem, and in particular, a belt root portion which receives the most compressive stress among belt tooth portions and a region including the belt root portion are reinforced to enable high load transmission, and furthermore, manufacturing is possible. It is an object of the present invention to provide a toothed belt easily.
【０００８】[0008]
【課題を解決するための手段】即ち、本発明の特徴は、
長さ方向に沿って歯部と溝部を交互に形成し、心線を背
部に埋設し、上記歯部における心線の位置からベルト歯
部先端に至るまでの領域を２つに区分し、心線からベル
ト歯部先端に至るまでの高さをＨとした場合に、心線か
らＨの２／３付近までの区域を動力伝達領域に、残りの
ベルト歯部先端に至る区域をベルト歯先部としたエラス
トマー材料からなる歯付ベルトにおいて、エラストマー
材料を含浸した不織布が溝部の歯底面と動力伝達領域内
に連続して配置され、不織布から分離し拡散した短繊維
が上記動力伝達領域内の不織布付近に分散し、かつ動力
伝達領域内のみに存在している歯付ベルトにある。ま
た、動力伝達領域内の短繊維の分散密度がベルト歯元部
付近で最も高くなっている場合も含む。 That is, the features of the present invention are as follows.
A tooth portion and a groove portion are alternately formed along the length direction, a core wire is embedded in a back portion, and a region from a position of the core wire in the tooth portion to a tip of a belt tooth portion is divided into two parts. Assuming that the height from the wire to the tip of the belt tooth is H, the area from the core wire to about 2/3 of H is the power transmission area, and the area from the core to the tip of the remaining belt tooth is the belt tip. In a toothed belt made of an elastomer material as a part, a non-woven fabric impregnated with an elastomer material is continuously disposed in a power transmission region and a tooth bottom surface of a groove portion, and short fibers separated and diffused from the non-woven fabric are formed in the power transmission region. In a toothed belt dispersed near the nonwoven fabric and present only in the power transmission area. Also, the dispersion density of short fibers in the power transmission area is
Including the case where it is highest in the vicinity.
【０００９】図１は本発明に係る歯付ベルトの要部断面
図であり、図２は図１に示す歯付ベルトの歯部の拡大図
である。本発明の歯付ベルト１は、液状ポリウレタン等
を原料として形成され、ベルト長手方向（図中矢印）に
沿って複数の歯部２と溝部３とを交互に有し、背部４に
心線５を埋設している。FIG. 1 is a sectional view of a main part of a toothed belt according to the present invention, and FIG. 2 is an enlarged view of a tooth portion of the toothed belt shown in FIG. The toothed belt 1 of the present invention is formed using a liquid polyurethane or the like as a raw material, has a plurality of teeth 2 and grooves 3 alternately along the belt longitudinal direction (arrows in the figure), and has a core 5 Is buried.
【００１０】上記歯部２は、心線５の外面Ｌからベルト
歯部先端６に至るまでの領域を２つに区分され、心線５
に近い領域がプーリからの大きな圧縮応力を受けて動力
の伝達を担う動力伝達領域７になり、ベルト歯部先端６
に至る領域をベルト歯先部８になる。ベルト歯元部９は
動力伝達領域７の一部となり、最も圧縮応力を受ける箇
所になっている。動力伝達領域７とベルト歯先部８との
境界線Ｂは、心線５の外面Ｌからベルト歯部先端６に至
るまでの高さをＨとした場合に、心線５の外面ＬからＨ
の２／３付近、好ましくは１／２付近にある。The tooth 2 is divided into two regions from the outer surface L of the core wire 5 to the tip 6 of the belt tooth.
A region close to the power transmission region 7 is a power transmission region 7 that receives a large compressive stress from the pulley to transmit power, and the belt tooth portion tip 6
Is the belt tip 8. The belt dedendum 9 becomes a part of the power transmission region 7 and is a portion that receives the most compressive stress. The boundary line B between the power transmission region 7 and the belt tip 8 is H from the outer surface L of the core wire 5 when the height from the outer surface L of the core wire 5 to the tip end 6 of the belt tooth is H.
Is around 2/3, preferably around 1/2.
【００１１】エラストマー材料を含浸した不織布１１
は、溝部の歯底面１２と動力伝達領域７内に連続して配
置されている。動力伝達領域７内の不織布１１は、歯底
面１２のそれよりやや薄くなって心線５から垂れ下がっ
た状態になり、動力伝達領域７を補強している。更に、
上記動力伝達領域７内では、短繊維１４が不織布１１付
近に分散して動力伝達領域７の補強を助長している。具
体的には、短繊維１４は不織布１１から分離し拡散して
いる。ベルト歯元部９では、他の動力伝達領域７に比べ
ると不織布１１および短繊維１４の添加量を多くして、
補強強化を向上させている。また、短繊維１４の分散状
態は、均一あるいは不均一でもよい。Nonwoven fabric 11 impregnated with an elastomer material
Are continuously arranged in the power transmission area 7 and the tooth bottom surface 12 of the groove. The nonwoven fabric 11 in the power transmission region 7 is slightly thinner than that of the tooth bottom surface 12 and hangs down from the core wire 5 to reinforce the power transmission region 7. Furthermore,
In the power transmission region 7, the short fibers 14 are dispersed in the vicinity of the nonwoven fabric 11 to promote reinforcement of the power transmission region 7. Specifically, the short fibers 14 are separated from the nonwoven fabric 11 and diffused. In the belt root portion 9, the amount of the nonwoven fabric 11 and the short fibers 14 is increased compared to the other power transmission regions 7,
Improve reinforcement reinforcement. The dispersion state of the short fibers 14 may be uniform or non-uniform.
【００１２】短繊維１４を不均一に分散させた実施例が
図３に示される。この歯付ベルト１では、短繊維１４の
分散密度がベルト歯元部９付近で最も高くなり、ベルト
歯元部９を局部的に補強して亀裂発生を阻止している。
この場合、動力伝達領域７とベルト歯先部８との境界線
Ｂは、心線５の外面ＬからＨの１／２付近にある。An embodiment in which the short fibers 14 are dispersed non-uniformly is shown in FIG. In the toothed belt 1, the dispersion density of the short fibers 14 is highest near the belt root 9, and the belt root 9 is locally reinforced to prevent cracks.
In this case, the boundary line B between the power transmission region 7 and the belt tip 8 is near 1/2 of H from the outer surface L of the core wire 5.
【００１３】また、ここで使用する不織布１１は、長さ
５〜６０ｍｍのポリエチレン、ポリプロピレン、ポリア
ミド、ポリエステル、アクリル、ガラス等の繊維を素材
とし、例えばウエブ中の繊維を機械的な作用により絡み
合わせ、交絡させて強力を生じさせるニードルパンチ等
により成形され、バインダー処理をしていない。構成し
ている短繊維１４は分離可能になっている。The nonwoven fabric 11 used here is made of a fiber such as polyethylene, polypropylene, polyamide, polyester, acrylic, glass or the like having a length of 5 to 60 mm, and the fibers in the web are entangled by mechanical action. It is formed by a needle punch or the like which is entangled to generate a strong strength, and is not subjected to a binder treatment. The constituent short fibers 14 are separable.
【００１４】その目付量は１３０〜２５０ｇ／ｍ2 で、
成形する前の不織布１１の厚みは、ＪＩＳＬ１０８５に
準じて測定すると１．０〜２．０ｍｍである。不織布１
１の厚みが２．０ｍｍを超えると、歯底面１２から心線
５中心位置までのＰＬＤが大きくなりすぎ、また不織布
１１と心線５を巻き付けた内金型を、予め液状ポリウレ
タンを注型した外金型に挿入してベルトを成形する方法
では、動力伝達領域７内の不織布１４から分離し拡散し
た短繊維１４がベルト歯先部８まで分散し、動力伝達領
域７内での短繊維の分散密度が小さくなって補強効果が
低下する。一方、不織布１１の厚みが１．０ｍｍ未満に
なると、ＰＬＤが小さくなりすぎて心線５が充分に保護
されず、また不織布１１から分散する短繊維１４の量が
減少して、動力伝達領域７を充分に補強できなくなる。The basis weight is 130 to 250 g / m 2 ,
The thickness of the nonwoven fabric 11 before molding is 1.0 to 2.0 mm when measured according to JIS L1085. Non-woven fabric 1
If the thickness of 1 exceeds 2.0 mm, the PLD from the tooth bottom surface 12 to the center of the core wire 5 becomes too large, and the inner mold around which the nonwoven fabric 11 and the core wire 5 are wound is pre-cast with liquid polyurethane. In the method of forming the belt by inserting the belt into the outer die, the short fibers 14 separated and diffused from the non-woven fabric 14 in the power transmission region 7 are dispersed to the belt tip 8, and the short fibers in the power transmission region 7 The dispersion density decreases and the reinforcing effect decreases. On the other hand, if the thickness of the nonwoven fabric 11 is less than 1.0 mm, the PLD becomes too small, the core wire 5 is not sufficiently protected, and the amount of the short fibers 14 dispersed from the nonwoven fabric 11 is reduced. Cannot be reinforced sufficiently.
【００１５】動力伝達領域７内で不織布１４から分離し
拡散した短繊維１４は、元の不織布１４の３０〜６０体
積％が好ましい。It is preferable that the short fibers 14 separated and diffused from the nonwoven fabric 14 in the power transmission area 7 are 30 to 60% by volume of the original nonwoven fabric 14.
【００１６】上記心線５としては、パラ系アラミド繊維
（商品名：トワロン、ケブラー、テクノーラ）あるいは
ガラス繊維（Ｅガラス、高強度ガラス）のいずれでもよ
く、その構成、太さ、撚り数等には左右されない。The core wire 5 may be either a para-aramid fiber (trade name: Twaron, Kevlar, Technora) or a glass fiber (E glass, high-strength glass), depending on its configuration, thickness, number of twists, etc. Is not affected.
【００１７】本発明の歯付ベルト１は、以下の通り製造
される。まず、図５に示すように、溝部２１を有する内
金型２０の外面に、厚１．０〜２．０ｍｍのエンドレス
状の不織布１１を装着した後、その上から心線５を巻き
付けて不織布１１を押し付ける。不織布１１は少し溝部
２１へ入り込む。この内金型２０を予め所定量の液状ポ
リウレタンを注入した外金型２２内に挿入し、金型を密
閉した後に金型内を減圧して液状ポリウレタン内の気泡
を除去するとともに、液状ポリウレタンを上方へ流動さ
せて不織布１１に浸透させる。このとき、液状ポリウレ
タンの乱流によって不織布１１から一部の短繊維１４が
分離し拡散する。液状ポリウレタンが上昇し終わると、
金型を開けて空気を入れて加圧し、金型温度を８０〜１
３０°Ｃで液状ポリウレタンを硬化させる。硬化後にベ
ルトスリーブを内金型２０から抜き取り、輪状に切断し
て歯付ベルトが得られる。The toothed belt 1 of the present invention is manufactured as follows. First, as shown in FIG. 5, an endless nonwoven fabric 11 having a thickness of 1.0 to 2.0 mm is mounted on the outer surface of an inner mold 20 having a groove portion 21, and a core wire 5 is wound therefrom to attach the nonwoven fabric. Press 11. The nonwoven fabric 11 slightly enters the groove 21. The inner mold 20 is inserted into an outer mold 22 in which a predetermined amount of liquid polyurethane has been previously injected, and after sealing the mold, the inside of the mold is depressurized to remove bubbles in the liquid polyurethane and to remove the liquid polyurethane. The non-woven fabric 11 is caused to flow upward and penetrate into the nonwoven fabric 11. At this time, some short fibers 14 are separated and diffused from the nonwoven fabric 11 by the turbulent flow of the liquid polyurethane. When the liquid polyurethane finishes rising,
Open the mold, inject air and pressurize, mold temperature 80 ~ 1
The liquid polyurethane is cured at 30 ° C. After curing, the belt sleeve is extracted from the inner mold 20 and cut into a ring to obtain a toothed belt.
【００１８】[0018]
【作用】この発明の歯付ベルト１は、不織布１１および
短繊維１４がべルト歯部２の中で最も圧縮応力を受ける
ベルト歯元部９とこれを含む動力伝達領域７を補強し
て、ベルト歯元部９の亀裂発生とその伝播を阻止するこ
とができる。即ち、図４に示すように、ベルト歯部２に
おいて心線５の位置からベルト歯部先端６に至るまでの
領域は、力学的にベルト歯部２の高さ方向に２つに分割
される。心線５に近い動力伝達領域７は、図中矢印方向
へ回転しているプーリ１７からベルト歯元部９付近で大
きな圧縮応力Ｆを受け、ベルト歯先部８に向かって序々
に小さな圧縮応力を受けている。ベルト歯元部９は大き
な圧縮歪みを受けている。The toothed belt 1 of the present invention reinforces the belt root portion 9 where the nonwoven fabric 11 and the short fibers 14 receive the most compressive stress in the belt tooth portion 2 and the power transmission region 7 including the belt root portion 9. The generation and propagation of cracks at the belt root 9 can be prevented. That is, as shown in FIG. 4, the area from the position of the core wire 5 to the belt tooth tip 6 in the belt tooth 2 is mechanically divided into two in the height direction of the belt tooth 2. . The power transmission area 7 near the core wire 5 receives a large compressive stress F near the belt root 9 from the pulley 17 rotating in the direction of the arrow in the figure, and gradually reduces the compressive stress F toward the belt tip 8. Is receiving. The belt root 9 is subjected to a large compressive strain.
【００１９】この動力伝達領域７とベルト歯先部８の境
界線Ｂは、心線５の下面Ｌからベルト歯部先端６に至る
までの高さをＨとした場合に、心線５の下面ＬからＨの
約２／３付近にある。この動力伝達領域７に不織布１１
を配置するとともに、この不織布１１から分離し拡散し
た短繊維１４をこの領域７内のみに存在させることで、
集中的に動力伝達領域７を補強することができる。ベル
ト歯先部８は、圧縮応力を受けるけれども短繊維１４を
存在させる必要がなく、エラストマー材料で充分であ
る。また、動力伝達領域７内で拡散した短繊維１４の分
散密度をベルト歯元部９付近で最も高くすることで、ベ
ルト歯元部９をさらに補強して亀裂発生を阻止すること
ができる。The boundary line B between the power transmission area 7 and the belt tip 8 is defined by the height H from the lower surface L of the core wire 5 to the tip 6 of the belt tooth portion. It is about 2/3 of L to H. The non-woven fabric 11
By disposing the short fibers 14 separated and diffused from the nonwoven fabric 11 only in the region 7,
The power transmission region 7 can be intensively reinforced. Although the belt tip 8 is subjected to compressive stress, the short fibers 14 need not be present, and an elastomeric material is sufficient. Further, by increasing the dispersion density of the short fibers 14 diffused in the power transmission region 7 near the root portion 9 of the belt, the root portion 9 of the belt can be further reinforced to prevent the occurrence of cracks.
【００２０】[0020]
【実施例】以下、本発明を実施例にて詳細に説明する。 実施例１ 目付量１７０ｇ／ｍ2 、厚さ１．３ｍｍで、ニードルパ
ンチにより成形され、バインダー処理がされていない
６．６ナイロン繊維からなる筒状の不織布を、溝部を有
する内金型の外面に装着した。次に、この上に、アラミ
ド繊維（商品名：トワロン：エンカ社製）１，０９０デ
ニール／５本（５，４５０デニール）を引き揃え、Ｓ方
向に１１回／１０ｃｍ、Ｚ方向に２５回／１０ｃｍの割
合で撚られたＳ、Ｚ一対の撚りコードを心線とし、この
心線を接着処理せずにスピニングした。心線占有率は９
０．０〜９４．２％である。The present invention will be described below in detail with reference to examples. Example 1 A cylindrical nonwoven fabric made of 6.6 nylon fiber, formed by needle punching and having not been subjected to binder treatment, having a basis weight of 170 g / m 2 and a thickness of 1.3 mm, was placed on the outer surface of an inner mold having a groove. Attached to. Next, on this, 1,090 denier / 5 strands (5,450 denier) of aramid fiber (trade name: Twaron: manufactured by Enka Co., Ltd.) were aligned, and 11 times / 10 cm in the S direction and 25 times / cm in the Z direction. A pair of S and Z twisted cords twisted at a ratio of 10 cm was used as a core wire, and this core wire was spun without performing an adhesive treatment. Core occupancy is 9
0.0 to 94.2%.
【００２１】上記内金型を予め所定量の液状ポリウレタ
ン原料を注入した外金型内に挿入して、金型内を密閉し
て減圧し液状ポリウレタンを上昇させて不織布内に浸透
させた。液状ポリウレタンが上昇し終わると、金型内を
開けて空気を入れて加圧し、所定温度で液状ポリウレタ
ンを硬化させた。この時の金型温度は、１１０°Ｃであ
った。硬化後にベルトスリーブを内金型から抜き取り、
輪状に切断して歯付ベルトを得た。得られたベルトサイ
ズは、ベルトの歯型：Ｓ８Ｍ（ＳＴＰＤ）、歯数：１５
６、ベルト幅：１２ｍｍ、歯ピッチ：８ｍｍであった。
ベルトは、図２に示すように、エラストマー材料を含浸
した不織布が溝部の歯底面と動力伝達領域内に連続して
配置され、動力伝達領域内に位置する不織布から拡散し
た短繊維がこの領域内のみに存在するものであった。The above inner mold was inserted into an outer mold into which a predetermined amount of liquid polyurethane raw material had been previously injected, and the inside of the mold was hermetically closed to reduce the pressure and raise the liquid polyurethane to permeate the nonwoven fabric. When the liquid polyurethane was completely lifted, the inside of the mold was opened, air was introduced, pressure was applied, and the liquid polyurethane was cured at a predetermined temperature. The mold temperature at this time was 110 ° C. After curing, remove the belt sleeve from the inner mold,
It was cut into a ring to obtain a toothed belt. The obtained belt size is as follows: tooth type of belt: S8M (STPD), number of teeth: 15
6, belt width: 12 mm, tooth pitch: 8 mm.
As shown in FIG. 2, in the belt, a nonwoven fabric impregnated with an elastomer material is continuously arranged in the power transmission region and the bottom surface of the groove, and short fibers diffused from the nonwoven fabric located in the power transmission region are formed in this region. Only existed.
【００２２】次に、このベルトを２軸走行試験機に取り
付けて走行させ、耐久試験を行った。この走行試験で
は、ベルトを駆動プーリ（歯数３６）と従動プーリ（歯
数３６）に巻き付け、駆動プーリの回転数１，２００ｒ
ｐｍ、負荷４．８ＫＷ、ベルト初張力４８ｋｇで走行さ
せた。その結果を表１に示す。Next, the belt was mounted on a two-axis running test machine and allowed to run to perform a durability test. In this running test, the belt was wound around a driving pulley (number of teeth: 36) and a driven pulley (number of teeth: 36).
pm, load 4.8 KW, and belt initial tension 48 kg. Table 1 shows the results.
【００２３】[0023]
【表１】 [Table 1]
【００２４】尚、比較例１として、実施例１と同様の方
法で作製した不織布を使用しない歯付ベルトを用いた。
また、比較例２として、不織布の代わりに、厚さ０．４
ｍｍの６ナイロン繊維からなる織布を用いて、実施例１
と同様の方法で作製した歯付ベルトを用いた。この結果
によると、本発明の歯付ベルトは、比較例２に比べて優
れた耐久性を有していることが判る。As Comparative Example 1, a toothed belt without using a nonwoven fabric manufactured in the same manner as in Example 1 was used.
Also, as Comparative Example 2, a thickness of 0.4
Example 1 using a woven fabric made of 6 mm nylon fibers
A toothed belt produced in the same manner as in Example 1 was used. According to these results, it is found that the toothed belt of the present invention has superior durability as compared with Comparative Example 2.
【００２５】[0025]
【発明の効果】以上のように、本発明の歯付ベルトで
は、不織布を最も圧縮応力を受ける動力伝達領域内に配
置するとともに、この不織布から分離し拡散した短繊維
をこの領域内のみに存在させることで、集中的に動力伝
達領域を補強することができ、ベルト歯元部を含む動力
伝達領域を効率よく補強してベルト歯元部から発生しや
すい亀裂を阻止することができ、また動力伝達領域内の
短繊維の分散密度をベルト歯元部付近で最も高くするこ
とで、ベルト歯元部をさらに補強して高負荷伝動を可能
にする効果がある。更に、従来のようにベルト歯部全体
を補強する場合に比べて、ベルト歯先部に補強材となる
短繊維を存在させる必要がないために、添加する補強材
を減量することができ、また製造も容易である。As described above, in the toothed belt according to the present invention, the nonwoven fabric is arranged in the power transmission region which receives the most compressive stress, and the short fibers separated and diffused from the nonwoven fabric are present only in this region. By doing so, the power transmission area can be intensively reinforced, the power transmission area including the belt root can be efficiently reinforced, and cracks that easily occur from the belt root can be prevented. By increasing the dispersion density of the short fibers in the transmission region near the root portion of the belt, the root portion of the belt is further reinforced to enable high-load transmission. Furthermore, compared to the case where the entire belt tooth portion is reinforced as in the related art, since it is not necessary to have the short fiber serving as a reinforcing material at the belt tip portion, the amount of the reinforcing material to be added can be reduced. It is easy to manufacture.
【図１】本発明に係る歯付ベルトの要部断面図である。FIG. 1 is a sectional view of a main part of a toothed belt according to the present invention.
【図２】図１に示す歯付ベルトの歯部拡大図である。FIG. 2 is an enlarged view of a tooth portion of the toothed belt shown in FIG.
【図３】本発明に係る他の歯付ベルトの歯部拡大図であ
る。FIG. 3 is an enlarged view of a tooth portion of another toothed belt according to the present invention.
【図４】本発明に係る歯付ベルトとプーリとが噛み合っ
ている状態を示す図である。FIG. 4 is a view showing a state in which the toothed belt and the pulley according to the present invention are engaged.
【図５】本発明に係る歯付ベルトの製造工程における金
型の断面図である。FIG. 5 is a sectional view of a mold in a manufacturing process of the toothed belt according to the present invention.
１ 歯付ベルト ２ 歯部 ３ 溝部 ４ 背部 ５ 心線 ６ ベルト歯部先端 ７ 動力伝達領域 ８ ベルト歯先部 ９ ベルト歯元部 １１ 不織布 １２ 歯底面 １４ 短繊維 DESCRIPTION OF SYMBOLS 1 Toothed belt 2 Tooth part 3 Groove part 4 Back part 5 Core wire 6 Belt tooth tip 7 Power transmission area 8 Belt tip 9 Belt root part 11 Non-woven fabric 12 Tooth base 14 Short fiber
Claims (3)
成し、心線を背部に埋設し、上記歯部における心線の位
置からベルト歯部先端に至るまでの領域を２つに区分
し、心線からベルト歯部先端に至るまでの高さをＨとし
た場合に、心線からＨの２／３付近までの区域を動力伝
達領域に、残りのベルト歯部先端に至る区域をベルト歯
先部としたエラストマー材料からなる歯付ベルトにおい
て、エラストマー材料を含浸した不織布が溝部の歯底面
と動力伝達領域内に連続して配置され、不織布から分離
し拡散した短繊維が上記動力伝達領域内の不織布付近に
分散し、かつ動力伝達領域内のみに存在していることを
特徴とする歯付ベルト。1. A tooth portion and a groove portion are alternately formed along a length direction, a core wire is buried in a back portion, and two regions from a position of the core wire in the tooth portion to a tip of a belt tooth portion are provided. When the height from the cord to the tip of the belt tooth is H, the area from the cord to about 2/3 of H is the power transmission area, and the area from the cord to the tip of the belt tooth is In a toothed belt made of an elastomeric material with the area of the belt tip, the nonwoven fabric impregnated with the elastomeric material is continuously arranged in the power transmission area with the tooth bottom of the groove and separated from the nonwoven fabric
The toothed belt, wherein the diffused short fibers are dispersed in the vicinity of the nonwoven fabric in the power transmission region and exist only in the power transmission region.
ルト歯元部付近で最も高くなっている請求項１記載の歯
付ベルト。2. The toothed belt according to claim 1, wherein the dispersion density of the short fibers in the power transmission region is highest near the root portion of the belt.
端に至るまでの高さをＨとした場合に、心線からＨの１
／２付近までの領域である請求項１または２記載の歯付
ベルト。3. When the height of the power transmission area from the core wire to the tip of the belt tooth portion is H, the power transmission area is 1 of H from the core wire.
The toothed belt according to claim 1 or 2, wherein the area is up to around / 2.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5340651A JP2622809B2 (en) | 1993-12-07 | 1993-12-07 | Toothed belt |
| US08/349,821 US5536214A (en) | 1993-12-07 | 1994-12-06 | Power transmission belt and method of manufacturing the same |
| DE4443597A DE4443597A1 (en) | 1993-12-07 | 1994-12-07 | Toothed drive transmission belt |
| US08/602,105 US5741197A (en) | 1993-12-07 | 1996-02-22 | Power transmission belt and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5340651A JP2622809B2 (en) | 1993-12-07 | 1993-12-07 | Toothed belt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07158700A JPH07158700A (en) | 1995-06-20 |
| JP2622809B2 true JP2622809B2 (en) | 1997-06-25 |
Family
ID=18339016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5340651A Expired - Fee Related JP2622809B2 (en) | 1993-12-07 | 1993-12-07 | Toothed belt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2622809B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11300177B2 (en) | 2016-06-06 | 2022-04-12 | Mitsuboshi Belting Ltd. | Toothed belt and manufacturing method therefor |
| JP6527549B2 (en) * | 2016-06-06 | 2019-06-05 | 三ツ星ベルト株式会社 | Toothed belt and method of manufacturing the same |
| JP6883541B2 (en) | 2017-05-30 | 2021-06-09 | 三ツ星ベルト株式会社 | Toothed belt transmission device |
| WO2018221538A1 (en) | 2017-05-30 | 2018-12-06 | 三ツ星ベルト株式会社 | Toothed belt transmission device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62136649U (en) * | 1986-02-20 | 1987-08-28 |
-
1993
- 1993-12-07 JP JP5340651A patent/JP2622809B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07158700A (en) | 1995-06-20 |
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